Should I even think of clear Jee advance If I cannot do HC verma..and my Jee mains marks are 100( 30 33 37 PCM)

Firstly i congratulate you for clearing your JEE mains.
Your are maintaing balance in three subjects so if maintain the same in advance and try to score 40% yow will definitely get into a better IIT.
And now jst gocus on improving your concept and focus only on deviation cases

Bro if you think you can polish your concepts in this 1 and half month you should. And btw why to leave such a chance. Many people don't get to give advance. You have got it. And as a motivation remember you are among the top 2 lakhs among whole INDIA. So go on! I am too preparing for it. Kudos to you. But please focus on on your state level examination more as they too can give you best goverment colleges if you have applied for that exam.